Comparison of the High Pressure Structures of Spinel Single Crystals with Composition Mg_<0.4>Al_<2.4>O_4 and ZnCr_2S_4

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The present study deals with single crystal structure investigations of Mg <SUB>0. 4</SUB>Al<SUB>2. 4</SUB>O<SUB>4</SUB> and ZnCr<SUB>2</SUB>S<SUB>4</SUB> by means of X ray scattering. The compressibility of the oxide substance is very small, whereas the structural changes are surprisingly high. In contrast, the compressibility of the thiospinel is 3 times higher, but the structural changes are very small. The transition to a non-detectable high pressure phase of Mg<SUB>0. 4</SUB>Al<SUB>2. 4</SUB>O<SUB>4</SUB> turns out to be reversible considering the existence of a spinel single crystal, but not reversible concerning the values of the lattice constant and the positional parameter of the oxygen anion. This can be explained by pressure induced disordering of the cations, which is preserved on abrupt pressure decrease.

収録刊行物

  • 高圧力の科学と技術 = The Review of high pressure science and technology  

    高圧力の科学と技術 = The Review of high pressure science and technology 7, 49-54, 1998 

    The Japan Society of High Pressure Science and Technology

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各種コード

  • NII論文ID(NAID)
    10002688710
  • NII書誌ID(NCID)
    AN10452913
  • 本文言語コード
    ENG
  • 資料種別
    ART
  • ISSN
    0917639X
  • NDL 記事登録ID
    4493833
  • NDL 雑誌分類
    ZP1(科学技術--化学・化学工業)
  • NDL 請求記号
    Z17-1589
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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